25 	struct udphdr *uh = udp_hdr(skb);  in __skb_udp_tunnel_segment()  local
43 		partial = (__force __wsum)uh->len;  in __skb_udp_tunnel_segment()
46 	partial = csum_sub(csum_unfold(uh->check), partial);  in __skb_udp_tunnel_segment()
119 		uh = udp_hdr(skb);  in __skb_udp_tunnel_segment()
126 			uh->len = htons(skb_shinfo(skb)->gso_size +  in __skb_udp_tunnel_segment()
128 					skb->head - (unsigned char *)uh);  in __skb_udp_tunnel_segment()
130 			uh->len = htons(len);  in __skb_udp_tunnel_segment()
136 		uh->check = ~csum_fold(csum_add(partial,  in __skb_udp_tunnel_segment()
140 			uh->check = gso_make_checksum(skb, ~uh->check);  in __skb_udp_tunnel_segment()
141 			if (uh->check == 0)  in __skb_udp_tunnel_segment()
142 				uh->check = CSUM_MANGLED_0;  in __skb_udp_tunnel_segment()
196 	struct udphdr *uh;  in __udpv4_gso_segment_csum()  local
202 	uh = udp_hdr(seg);  in __udpv4_gso_segment_csum()
205 	if (uh->check) {  in __udpv4_gso_segment_csum()
206 		inet_proto_csum_replace4(&uh->check, seg, *oldip, *newip,  in __udpv4_gso_segment_csum()
208 		inet_proto_csum_replace2(&uh->check, seg, *oldport, *newport,  in __udpv4_gso_segment_csum()
210 		if (!uh->check)  in __udpv4_gso_segment_csum()
211 			uh->check = CSUM_MANGLED_0;  in __udpv4_gso_segment_csum()
222 	struct udphdr *uh, *uh2;  in __udpv4_gso_segment_list_csum()  local
226 	uh = udp_hdr(seg);  in __udpv4_gso_segment_list_csum()
241 					 &uh2->source, &uh->source);  in __udpv4_gso_segment_list_csum()
244 					 &uh2->dest, &uh->dest);  in __udpv4_gso_segment_list_csum()
271 	struct udphdr *uh;  in __udp_gso_segment()  local
278 	if (gso_skb->len <= sizeof(*uh) + mss)  in __udp_gso_segment()
294 		skb_shinfo(gso_skb)->gso_segs = DIV_ROUND_UP(gso_skb->len - sizeof(*uh),  in __udp_gso_segment()
301 		if (skb_pagelen(gso_skb) - sizeof(*uh) == skb_shinfo(gso_skb)->gso_size)  in __udp_gso_segment()
309 		uh = udp_hdr(gso_skb);  in __udp_gso_segment()
311 			uh->check = ~udp_v6_check(gso_skb->len,  in __udp_gso_segment()
315 			uh->check = ~udp_v4_check(gso_skb->len,  in __udp_gso_segment()
320 	skb_pull(gso_skb, sizeof(*uh));  in __udp_gso_segment()
342 	uh = udp_hdr(seg);  in __udp_gso_segment()
350 	newlen = htons(sizeof(*uh) + mss);  in __udp_gso_segment()
351 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
363 		uh->len = newlen;  in __udp_gso_segment()
364 		uh->check = check;  in __udp_gso_segment()
369 			uh->check = gso_make_checksum(seg, ~check) ? :  in __udp_gso_segment()
373 		uh = udp_hdr(seg);  in __udp_gso_segment()
379 	check = csum16_add(csum16_sub(uh->check, uh->len), newlen);  in __udp_gso_segment()
381 	uh->len = newlen;  in __udp_gso_segment()
382 	uh->check = check;  in __udp_gso_segment()
387 		uh->check = gso_make_checksum(seg, ~check) ? : CSUM_MANGLED_0;  in __udp_gso_segment()
419 	struct udphdr *uh;  in udp4_ufo_fragment()  local
447 	uh = udp_hdr(skb);  in udp4_ufo_fragment()
450 	uh->check = 0;  in udp4_ufo_fragment()
452 	uh->check = udp_v4_check(skb->len, iph->saddr, iph->daddr, csum);  in udp4_ufo_fragment()
453 	if (uh->check == 0)  in udp4_ufo_fragment()
454 		uh->check = CSUM_MANGLED_0;  in udp4_ufo_fragment()
478 	struct udphdr *uh = udp_gro_udphdr(skb);  in udp_gro_receive_segment()  local
487 	if (!uh->check) {  in udp_gro_receive_segment()
493 	ulen = ntohs(uh->len);  in udp_gro_receive_segment()
494 	if (ulen <= sizeof(*uh) || ulen != skb_gro_len(skb)) {  in udp_gro_receive_segment()
508 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source)) {  in udp_gro_receive_segment()
518 		flush = gro_receive_network_flush(uh, uh2, p);  in udp_gro_receive_segment()
541 				skb_gro_postpull_rcsum(skb, uh,  in udp_gro_receive_segment()
560 				struct udphdr *uh, struct sock *sk)  in udp_gro_receive()  argument
593 	    (uh->check && skb->ip_summed != CHECKSUM_PARTIAL &&  in udp_gro_receive()
612 		if ((*(u32 *)&uh->source != *(u32 *)&uh2->source) ||  in udp_gro_receive()
613 		    (!uh->check ^ !uh2->check)) {  in udp_gro_receive()
620 	skb_gro_postpull_rcsum(skb, uh, sizeof(struct udphdr));  in udp_gro_receive()
646 	struct udphdr *uh = udp_gro_udphdr(skb);  in udp4_gro_receive()  local
650 	if (unlikely(!uh))  in udp4_gro_receive()
657 	if (skb_gro_checksum_validate_zero_check(skb, IPPROTO_UDP, uh->check,  in udp4_gro_receive()
660 	else if (uh->check)  in udp4_gro_receive()
667 		sk = udp4_gro_lookup_skb(skb, uh->source, uh->dest);  in udp4_gro_receive()
669 	pp = udp_gro_receive(head, skb, uh, sk);  in udp4_gro_receive()
679 	struct udphdr *uh = udp_hdr(skb);  in udp_gro_complete_segment()  local
681 	skb->csum_start = (unsigned char *)uh - skb->head;  in udp_gro_complete_segment()
698 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp_gro_complete()  local
702 	uh->len = newlen;  in udp_gro_complete()
705 				udp4_lib_lookup_skb, skb, uh->source, uh->dest);  in udp_gro_complete()
707 		skb_shinfo(skb)->gso_type = uh->check ? SKB_GSO_UDP_TUNNEL_CSUM  in udp_gro_complete()
736 	struct udphdr *uh = (struct udphdr *)(skb->data + nhoff);  in udp4_gro_complete()  local
740 		uh->len = htons(skb->len - nhoff);  in udp4_gro_complete()
750 	if (uh->check)  in udp4_gro_complete()
751 		uh->check = ~udp_v4_check(skb->len - nhoff, iph->saddr,  in udp4_gro_complete()